Editor's Note: ODW's review of SEPTIEN from Sundance Film Festival 2011 is republished for the current VOD release.

On Demand Weekly provides new movie reviews of hot movies on demand and from the POV of watching from the comfort of your home. Today’s review: Direct from the Sundance Film Festival - SEPTIEN On Demand (Sundance Selects).

Learn about all five films available simultaneously from the 2011 Sundance Film Festival and On Demand here.

Challenging. Obtuse. Infuriating. The world of independent film is often all three at once. So it is with director Michael Tully's SEPTIEN, as undefinable and indescribable a horror film as one is likely to encounter all year. SEPTIEN tells the story of two brothers, Amos and Ezra, living together on a farm in the mountains. When their long-gone brother, Cornelius -- played by Tully -- returns home, the film swerves into a surreal trip that includes sports hustling, gas huffing, and the scary de-evolution of this backwoods clan.

Michael Tully / SEPTIEN (Sundance Selects)

Generating an air of menace from the first frame, Tully keeps the audience off-balance throughout what turns out to be a surprisingly conventional three-act structure. Ezra, vaguely feminine, seems more of a mother to his brothers than a sibling, cooking and obsessively scrubbing their rundown house. Amos spends his time painting macabre, sexually explicit works in the shed.

SEPTIEN (Sundance Selects)

And the nearly silent Cornelius plays tennis and basketball -- brilliantly -- against locals for money, even as he filches gas from nearby pumps and passes out in fume-induced euphoria in the woods. Clearly damaged, haunted by some long-ago happening, it's only a matter of time before the three brothers are offered an opportunity for redemption. Or is it revenge?